Apparatus for washing or developing photographic plates or films.



. R. KERSTEN. APPARATUS FOR WASHING 0R DEVELOPING PHOTQGRAPHIC PLATES 0R HLMS. APPUCATION FILED 050.11.1915.

3% 0 Patented July 24, 1917.

win sans earner mun.

RUDOLF KER-STEM, OF DRESDEN, NORTH DAKOTA.

APPARATUS FOR WASHING Application filed December 17, 1915.

To all whom it may concern:

Be it known that I, RUooLr KnnsrEN, citizen of the United States, intention declared, residing at Dresden, in the county of Cavalier and State of North Dakota, have invented certain new and useful Improvements in Apparatus for lVashing or Developing Photographic Plates or Films, of which the following is a specification.

The present invention relates to apparatuses for washing or developing photographic plates or films and has for its object to provide a construction whereby a number of photographic plates or films ca be sumultaneouslj quickly and efficiently washed or developed.

lVith this object in view my invention consists in the construction, combination and arrangement of parts, as will be hereinafter fully specified and set forth in the appended claims. I

In the accompanying drawing, which forms part of this specification and in which similar reference characters denote corresponding parts, Figure l is a longitudinal section of my apparatus; Fig. 2 is an enlarged section on line 22 of Fig. l and Fig. 3 is a top plan view of a detail.

In the drawing a denotes a tank of metal or other suitable material and which may be either cylindrical as shown or of other suitable shape. This tank has on top a removable cover or lid a provided with a funnel a and at its bottom a flow off valve or cook 0: W hen the apparatus is used for washing it may be placed under a faucet, so that on opening the valve the water may freely circulate therethrough.

ievolubly borne in the tank is a central horizontal spindle b which at one end projects outwardly from the tank and carries a crank arm 5 whereby the spindle can be manually rotated. The part of the spindle extending within the tank is preferably of polygonal shape and is provided on each side of its circumference with two or more dovetailed grooves or sockets c. Adapted to be removably secured in the said sockets are rectangular frames (Z, having open faces and Specification of Letters Patent.

OR DEVELC'PING IPHGTOGRAPHIC PLATES 0E FILMS.

Patented may ea, mi v. Serial No. 67,398.

of which each on one of its longitudinal edges is provided with tenons or dove-tailed projections c adapted to snugly fit in the said sockets. These frames may be each divided in two compartments, cl, 02 each compartment serving to receive a photo graphic plate or film h. The openings (Z through which the plates or films are insorted into the compartments of the frames, are adapted to be closed by slides f borne in grooves (Z made in the walls of the frames. The frames when secured to the spindle extend in radial direction from the latter and will be caused to revolve around the axis of the spindle when the latter is rotated. Thereby the plates or films contained in the frames and having their sensitive faces exposed to the liquid circulating through or filling the tank will become thoroughly washed or developed as the case may be.

One advantage of my novel construction is that a great number of plates or films, say a dozen at a time, can be most effectively, quickly and uniformly treated.

Another advantage is that since the frames can be easily removed from the spindle, the same may be easily exchanged for smaller or larger ones to accommodate variously sized plates or films. Thus the same apparatus can be employed for plates or films of various sizes.

lVhile I have described one embodiment of my invention, it is understood that since various modifications may be made in the construction without deviating from the principle of my invention, I do not limit myself to the details described and shown.

What I claim and desire to secure by Letters Patent is:

1. A washing or developing apparatus for photographic plates or films, comprising a tank, a spindle revolubly borne in said tank and having sockets on its circumference and frames removably held in said sockets for holding said plates or films so that by turning the spindle the plates or films will be moved throng the liquid in the tank.

2. A washing or developing apparatus for photographic plates or films, comprising a 2 1,234,346 tank, a polygonal spindle revolubly bo 'ne in ference, and frames for liolclin saicl plates 10 said tank and having sockets on each side of and films removably borne 1n said sockets. 1ts circumterence, ancl trainee reniovably In testimony whereof I afiiX my signature borne in said sockets for holcllng said plates in presence of two Witnesses.

5 films- BUDOLF KERSTEN.

3. A Washing or developing apparatns for D photographic plates or films, compr slng a Htness'es: tank, a spindle revolubly borne in said tank J. A. TERHAAR,

and havmg clove-tailed sockets on its oircuni- A. J EVESLAGE.

ined for five cents each, by addressing the Commissioner of Patents,

Copies of this patent may be obta Washington, D. G. 

